/*
Language: Java
Author: Vsevolod Solovyov <vsevolod.solovyov@gmail.com>
Category: common, enterprise
*/

export default function(hljs) {
    var JAVA_IDENT_RE = '[\u00C0-\u02B8a-zA-Z_$][\u00C0-\u02B8a-zA-Z_$0-9]*';
    var GENERIC_IDENT_RE = JAVA_IDENT_RE + '(<' + JAVA_IDENT_RE + '(\\s*,\\s*' + JAVA_IDENT_RE + ')*>)?';
    var KEYWORDS =
        'false synchronized int abstract float private char boolean var static null if const ' +
        'for true while long strictfp finally protected import native final void ' +
        'enum else break transient catch instanceof byte super volatile case assert short ' +
        'package default double public try this switch continue throws protected public private ' +
        'module requires exports do';

    // https://docs.oracle.com/javase/7/docs/technotes/guides/language/underscores-literals.html
    var JAVA_NUMBER_RE = '\\b' +
        '(' +
        '0[bB]([01]+[01_]+[01]+|[01]+)' + // 0b...
        '|' +
        '0[xX]([a-fA-F0-9]+[a-fA-F0-9_]+[a-fA-F0-9]+|[a-fA-F0-9]+)' + // 0x...
        '|' +
        '(' +
        '([\\d]+[\\d_]+[\\d]+|[\\d]+)(\\.([\\d]+[\\d_]+[\\d]+|[\\d]+))?' +
        '|' +
        '\\.([\\d]+[\\d_]+[\\d]+|[\\d]+)' +
        ')' +
        '([eE][-+]?\\d+)?' + // octal, decimal, float
        ')' +
        '[lLfF]?';
    var JAVA_NUMBER_MODE = {
        className: 'number',
        begin: JAVA_NUMBER_RE,
        relevance: 0
    };

    return {
        aliases: ['jsp'],
        keywords: KEYWORDS,
        illegal: /<\/|#/,
        contains: [
            hljs.COMMENT(
                '/\\*\\*',
                '\\*/',
                {
                    relevance : 0,
                    contains : [
                        {
                            // eat up @'s in emails to prevent them to be recognized as doctags
                            begin: /\w+@/, relevance: 0
                        },
                        {
                            className : 'doctag',
                            begin : '@[A-Za-z]+'
                        }
                    ]
                }
            ),
            hljs.C_LINE_COMMENT_MODE,
            hljs.C_BLOCK_COMMENT_MODE,
            hljs.APOS_STRING_MODE,
            hljs.QUOTE_STRING_MODE,
            {
                className: 'class',
                beginKeywords: 'class interface', end: /[{;=]/, excludeEnd: true,
                keywords: 'class interface',
                illegal: /[:"\[\]]/,
                contains: [
                    {beginKeywords: 'extends implements'},
                    hljs.UNDERSCORE_TITLE_MODE
                ]
            },
            {
                // Expression keywords prevent 'keyword Name(...)' from being
                // recognized as a function definition
                beginKeywords: 'new throw return else',
                relevance: 0
            },
            {
                className: 'function',
                begin: '(' + GENERIC_IDENT_RE + '\\s+)+' + hljs.UNDERSCORE_IDENT_RE + '\\s*\\(', returnBegin: true, end: /[{;=]/,
                excludeEnd: true,
                keywords: KEYWORDS,
                contains: [
                    {
                        begin: hljs.UNDERSCORE_IDENT_RE + '\\s*\\(', returnBegin: true,
                        relevance: 0,
                        contains: [hljs.UNDERSCORE_TITLE_MODE]
                    },
                    {
                        className: 'params',
                        begin: /\(/, end: /\)/,
                        keywords: KEYWORDS,
                        relevance: 0,
                        contains: [
                            hljs.APOS_STRING_MODE,
                            hljs.QUOTE_STRING_MODE,
                            hljs.C_NUMBER_MODE,
                            hljs.C_BLOCK_COMMENT_MODE
                        ]
                    },
                    hljs.C_LINE_COMMENT_MODE,
                    hljs.C_BLOCK_COMMENT_MODE
                ]
            },
            JAVA_NUMBER_MODE,
            {
                className: 'meta', begin: '@[A-Za-z]+'
            }
        ]
    };
}